Strain-resisting mechanism.



G. H. PORSYTH. STRAIN BESISTING MBGHANISM. APPLICATION AFILED 1511.28, 1905 GEoReE nl" FoRsYTH, oF CHICAGO, ILLINOIS.

STRAIN-RE SISTIN G MICHANIM.

. specification;

1 and advantages of both the sp I tion 'forms of draft rigging.

Wardly as at 3,

v ing surfaces vthe sills'il and draft-rigging mechanism.

This invention relates to improvements in -mechanism forl resisting draft and bufin'g strains, having reference more particularly. to such mechanism when employed in coni ncction with railway cars.

The main object of the invention is to provide a draft and buing mechanism of large capacity and combining the nature ring and frichIy invention, and the advantages secured thereby, will be readily understood" when considered in connection with theaccompanying drawings which show practical mechanical embodiments thereof, and in which- Figure` 1 is a plan View. Fig. 2 is a longitudinal sectional view of one form of my invention. Figs. 3 and .ta-re similar plan and longitudinal sectional views of another form of the invention. Figs. 5 and 6 are smilarw'iews, respectively, illustrating the use of followers having reversely curved cooperating surfaces. Fig. v7 is` a cross-seC-' tional view on the line 7 '7 of Fig. 5. Fig.' 8 is a plan view similar to Figs. 1, 3 and 5, but illustrating followers having coperatof varying degrees of `curvature. Y

Referring to `the drawings,

1 designates the customary center sil-ls of a car, 2 the .drawbalg 3 the yoke attached thereto.

6 designates a pair of castings riveted `to providing a pocket for the 7 designates the end portions of these castings to which are fastened by bolts 10 the supporting runway bars `9 for the spring' platesor followers hereinafter described.

In Figs. 1 and 2 the yoke 3 is rigidly attached to the boss of the drawbar 2 by rivets 5. The ends of the yoke 3 are bent inentering transverse grooves formed between opposed shoulders 2& and 2 of the boss of the drawbar.

. 1l designates each of a pair of end followers which at their ends abut against the usual follower stops 8 of the castings 6.

specification-f Letters Patent. Application led January 28, 1905.

-the opposed faces of which are the longitudinal Patented May 25, 1909. sez-131 No. 243,143.

The inner faces of these follower members 11 are'forined with curved protuberant: or convex surfaces 12 which respectively bear against the outermost plates of two'sets of flat spring plates 21. sets of s ring plates is located an intermediate vfol ower member or spacing block 16, inwardly curved'or concaved, preferably on substantially the same. degrees of curvature as the opposed faces 12 of the end followers 11; so that, under butling or draft strains the opposed convex and concave surfaces of adjacent followers coperate to flex the spring plates lying between them.

In the form of the invention shown in Figs. 1 and 2 I provide in advance ofthe ront follower member 11a block 18 having a convex outer surface 20, between which and the rounded convex end 4: of the drawbar I .inter-pose a set of auxiliary spring plates 22, the ends of this set abutting against curved or inclined surfaces 8" 0f the l 80 follower stops at the forward-end of the cast# ings 6. Preferably I conform the curved, surfaces 4 at the end of the drawbar and the. surfaces 8 of the stop lugs so that, when 'the plates 22 have been fully b 'owed inwardly of the car` under builing strains, these curves become concentric with each other. and uniformly contact with the adjacent surfaces of the spring plates 22. The forward follower member l1 is preferably formed with a central 'convex protuberant portion 13 which engages a corresponding concave surface 19 ofthe block 18, which latter has lateral eng'agement with the edges ofthe top and bottom members of the yokeby means of the ears 20. The rear portion 14of the rear follower member 11 is preferably made concave to engage a convex surface 15* of a block 15 riveted to provided with. yoke-engaging' ears 15'?. It will be seen that, when the drawba'has been urawn to one side, so as to lie at an angle to bers 11 and .the coperating blocks 18 and 15 will tend', under't-he outward thrust of the resistance medium, to impart the drawbar 'a self-centering tendency.

While I have shown the sp'ringplates of f each group as equal in number, it 1s evident ,that they could differ from each other in this respectfasralso in respect to the resistance capacity of -the'y individual plates, whereby the end of the yoke, and

median line of the car,` those curved surfaces of the follower mem one series o'f spring plates might ilex'fmore readily under moderate strains ofbuing ordra-ft transmitted thereto, andsuch an arof car wherein the center sills-are located Ycomparatively close together. It will be evi,-

dent thatf the spring plates 33 shown in these figures, if horizontally disposed, -as 1n the construction already described, lwould have to be so short that they would readily' tend to set and lose their resiliency. In

order that they may be of suicient length I have shown them-as vertically disposed between the end` follower members 28 and the intermediate .follower member 32. Inthis form of the invention, the yoke 3 ispivotally connected with the drawbar, this connection being established by means of shortenhollow sleeves 25, which enter within'the boss of the drawbar, and throughY which and washers 26 passes the rivet or pivot-pin 27. The outer ends of the sleeves 25 project somewhat beyond the outer surfaces of the yoke 3, and consequently the heads' of the rivets may force fthe washers 26 hard against the sleeves 25 without binding the yoke 3, thus permitting the drawbar 2 to have entire freedom of angular'movement relatively to the yoke-3. I also provide a wearing strip 23 inwardlyiturned at its forward end, the outer surfaceof which is .convexto conform to theinner concave surfaces of the inwardly turned'lips 3a of the yoke`3, these coper- -`ating concave and convex surfaces being made on thelarc of` acircle whose center is t-he axis of the rivet 27. The outer face of the front follower 28'is convex, conforming vto the concave surfacesl of a block 30 which ish'eld in position by means of a boss 30a which enters a sockelJ in the end of the drawbar and is secured therein by a rivet 24. Under the outward thrust of the resistance medium of theV draft-rigging these convex and concave surfaces coperate, lwhen the drawbar is drawn to one side, to impart thereto a re-centering tendency.

As shown in Fig. Ll,`the depth of the yoke 3 is considerably greater than in the construction show/n in Figs. land 2,the height of the followers 28 and 32 being made to correspond. /Consequently, the depth of the castings is also increased, and the supporting bars 9 are increased, and the support-r than is shown in Fig. 2. i The ends of the bars 49 are upturnedoan'd are attached by the bolts 10 to corresponding inclined members 7 Aof the end portion of the casting 6.

"In Figs. 5 and 6 Ijhave illustrated a modification wherein the end and intermediate,

follower members f 34 and 35 have their proximate. surfaces formed with reverse curves made up of alternate convex andconcave surfaces 34, 35a and 34h, 35h, respectively. The oppositely `curved portions of these 'reversely curved surfaces' may be'of 4the same or varying degrees of curvature, as v desired. In thcapplication of buing and draft strains, rthe/intermediate parts of the spring plates are first bent until the ends of the followers 34 engage the endsl vof the spring'plates, whereupon -the latter are then flexed in the opposite direction; this con- `struction affording a draftmigging capable of a very high-degree of elastic resistance.

In the modification shown inFig. 8 I provide the end and intermediate follower members 37 and BS-wit-h simple curvesof varying curvature, the end curves 37b and 38b being more abrupt than the intermediate curves 37a and'a. The more moderate strains of bufhng or draft afford a-gradual and continiious bend to the intermediatefportions of v` the spring plates between the surfaces 37* and 38a, whereas the `1nore violent strains, especially those of buffing, impart in addition more abrupt bends in the region ofthe ends of the sprlng plates between the curves 37b and 38', thereby greatly augmenting the elastic resist-ance capacity of the rigging.A

It will be seen that one 'of the advantages of this invention lies in the fact that flat spring plates can be employed, the rate of its increase in spring resistance capacity may be governed according to. the kind and degrec of the inclination or curvaturev given to `the spring-contacting surface or surfaces of afollower member. A further advantage resides in the fact that. Ishe inclines or curves of the follower member may be` solimited, proportionally to the thickness or temper of thespring plates, as to prevent any danger pft'he latter being. flexed beyond a point of safety and becoming set, or breakin ther, it will be understood that various structuralmodifications may bev'employed. ,.A. still further advantage inhering'in the use of two sets of spring plates resides Vthe fact that each set acts as a motion-reducing device Vrelatively to the other set'and the moving follower or followers which operate to flex the same by lessening the extent of movement which said other set undergoes relatively to the movement of the drawbar and yoke, thereby imparting a correspondingly less flexure to said other set of. spring plates, with a corresponding decrease in the"- danger of breaking or settingf'the spring plates.

I claim:

l. In a. draft-rigging, the combination' I, draw-bar and the front follower stops, and

2 -A buliing mechanism for cars, comprisin yo ve or'extension, followers, front and rear follower stops, a resistance medium between said followers, an' auxiliary resistance medium consisting of one'or more springA plates interposedbetween the inner end of the a follower block between` said auxiliary spring plate or `lower,-sullvstantial y as described.

3. In a draft-rigging for cars, the combi,-

nation with; follower stops and a draw-bar provided with a yoke, of a pair of outer nation with a draw-bar and yoke, of 'a pair.

I' :of followers 'extending across said yoke and engagin stop members carried by thecar, saidv'fol owers having their opposed faces l:foi-med on curves of varying degrees of.

curvature, andl sprin lates ada ted to be ollowers, su stantially as described. 5. Ina draft-rigging for cars, the combination with a draw-bar and yoke, of a pair i of followers extending across said yoke and iliillet'trs Patent N o. 923,040'.

'engagin stop members carried by the car, said Afol owers having their o'pposed faces each formed with reversely curved portions,

and spring platesadapted to be flexed between sai followers,v substantially as de scribed.

" :Signed and sealed i [SEAL] in combinations. draw-bar, draw-bartween an lates and the front fol- 4 this 2nd day of November, A. D., 1909.1

6. In; a draft-riggi'n the combination with follower stops and a .draw-bar provided wi'th a4 yoke, of two sets of spring cushionin plates, a follower interposed beengaging the ends of said sets of cushioning plates,` and front and rear followers acted upon by the yoke and drawbar, respectively, and centrally enga ing the Youter sides of said sets of sprlng cus ioping plates, respectively, substantially as described.

7. In -a draft rigging lthe combination with follower slifgps a11d a .drawbar and yoke, of two sets of spring cushioning plates, a follower having. Wldeends interposed between and engaglng the ends ofsaid sets of spring plates, and front and rear followers centrally engaging the outer sides of -saidsets of spring plates and engaged by'the drawbar and yoke, respectively, substantially as described. v

S. In a draft-rigging, the combination with a drawbar and its yoke, of a plurality of sets of normally straight spring plates, followers arranged respectively op osite the outer sides of said sets of spring p ates, and

an intern'iediate follower arranged. between the setsof spring plates, .said followers having their opposing faces op' ositely curved whereby each set of sprlng p -ates vis engaoed :it its ends by one of said followers and lbetween its ends by the opposing -follower, substantially/as described. f

GEORGE H.' roRsYTH. `lVitnvesses: y

SAMUEL N. POND, brani-:moli C. GOODWIN.

In is hrebyrtied than in Letters Patent M). @acidi/granted May 25, 1909, upon, the; application of George Forsyth, of Chicago, Illinois, for an improvement .f Strain-Resisting Mechanisms, ian error appears in the printed specification requiring` correction as follows: Page 2, line 54, the words increased, and the support should be stricken out and the words located considerably lower should be vinsertedinstead; and thatlthe said Letters Patent should be read with this-correction therein that the same mayconforrn to the record of the case inthe latentOice.

2o. c. BiLLiNGs;

I, draw-bar and the front follower stops, and

2 -A buliing mechanism for cars, comprisin yo ve or'extension, followers, front and rear follower stops, a resistance medium between said followers, an' auxiliary resistance medium consisting of one'or more springA plates interposedbetween the inner end of the a follower block between` said auxiliary spring plate or `lower,-sullvstantial y as described.

3. In a draft-rigging for cars, the combi,-

nation with; follower stops and a draw-bar provided with a yoke, of a pair of outer nation with a draw-bar and yoke, of 'a pair.

I' :of followers 'extending across said yoke and engagin stop members carried by thecar, saidv'fol owers having their opposed faces l:foi-med on curves of varying degrees of.

curvature, andl sprin lates ada ted to be ollowers, su stantially as described. 5. Ina draft-rigging for cars, the combination with a draw-bar and yoke, of a pair i of followers extending across said yoke and iliillet'trs Patent N o. 923,040'.

'engagin stop members carried by the car, said Afol owers having their o'pposed faces each formed with reversely curved portions,

and spring platesadapted to be flexed between sai followers,v substantially as de scribed.

" :Signed and sealed i [SEAL] in combinations. draw-bar, draw-bartween an lates and the front fol- 4 this 2nd day of November, A. D., 1909.1

6. In; a draft-riggi'n the combination with follower stops and a .draw-bar provided wi'th a4 yoke, of two sets of spring cushionin plates, a follower interposed beengaging the ends of said sets of cushioning plates,` and front and rear followers acted upon by the yoke and drawbar, respectively, and centrally enga ing the Youter sides of said sets of sprlng cus ioping plates, respectively, substantially as described.

7. In -a draft rigging lthe combination with follower slifgps a11d a .drawbar and yoke, of two sets of spring cushioning plates, a follower having. Wldeends interposed between and engaglng the ends ofsaid sets of spring plates, and front and rear followers centrally engaging the outer sides of -saidsets of spring plates and engaged by'the drawbar and yoke, respectively, substantially as described. v

S. In a draft-rigging, the combination with a drawbar and its yoke, of a plurality of sets of normally straight spring plates, followers arranged respectively op osite the outer sides of said sets of spring p ates, and

an intern'iediate follower arranged. between the setsof spring plates, .said followers having their opposing faces op' ositely curved whereby each set of sprlng p -ates vis engaoed :it its ends by one of said followers and lbetween its ends by the opposing -follower, substantially/as described. f

GEORGE H.' roRsYTH. `lVitnvesses: y

SAMUEL N. POND, brani-:moli C. GOODWIN.

In is hrebyrtied than in Letters Patent M). @acidi/granted May 25, 1909, upon, the; application of George Forsyth, of Chicago, Illinois, for an improvement .f Strain-Resisting Mechanisms, ian error appears in the printed specification requiring` correction as follows: Page 2, line 54, the words increased, and the support should be stricken out and the words located considerably lower should be vinsertedinstead; and thatlthe said Letters Patent should be read with this-correction therein that the same mayconforrn to the record of the case inthe latentOice.

2o. c. BiLLiNGs;

Correctionilh lLet'ters Patent No. 923,040'.

It is hereby certified that in Letters Patent No. 923,040, granted Muy 25, 1909, upon the application of George H. Forsyth, of Chicago, Illinois, for an improvement Strain-Resisting Mechanisms, an error appears in the printed specification requiring` correction as follows: Page 2, line 54, the Words incrcased, and the support should be stricken out and. the words locatari comdfmbly/ fn/wshould be inserted instead; and that the said Letters Patent should bc road with thir-v correction therein that the same mayiconform to the record 0f the caso in the Patent Uce.

' Signed and sealed this 2nd da); of November, A. D., 1909.

[SEAL] C. C. BILLINGS.'

Acting Commissioner of Patents. 

